select u.table_name table name, u.column_name field name, a.DATA_TYPE field type, a.DATA_LENGTH field length, u.comments comment from user_col_comments u,all_tab_columns a
where u.table_name=a.TABLE_NAME and a.OWNER='XMUEDU' and u.column_name=a.COLUMN_NAME --and a.TABLE_NAME= 'BASIC_CODE'
order by u.table_name